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MHT CET20228 Aug 2022Evening ShiftChemistryIonic EquilibriumActual

A buffer solution is prepared by mixing 0.1 M HCN and 0.2 M NaCN What is the pH of buffer solution if pKa of HCN is 9.3? ( 2=0.3010)

Options

  1. A4.2
  2. B2.0
  3. C9.60
  4. D6.15

Correct answer

C. 9.60

Step-by-step solution

aligned & pH = pKa + [ Salt ] [ Acid ] & =9.3+ (0.2) (0.1) & =9.3+0.3010 & =9.60 aligned

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